ceph/src/spdk/dpdk/drivers/mempool/stack/rte_mempool_stack.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2016-2019 Intel Corporation
   3  */
   4
   5 #include <stdio.h>
   6 #include <rte_mempool.h>
   7 #include <rte_stack.h>
   8
   9 static int
  10 __stack_alloc(struct rte_mempool *mp, uint32_t flags)
  11 {
  12         char name[RTE_STACK_NAMESIZE];
  13         struct rte_stack *s;
  14         int ret;
  15
  16         ret = snprintf(name, sizeof(name),
  17                        RTE_MEMPOOL_MZ_FORMAT, mp->name);
  18         if (ret < 0 || ret >= (int)sizeof(name)) {
  19                 rte_errno = ENAMETOOLONG;
  20                 return -rte_errno;
  21         }
  22
  23         s = rte_stack_create(name, mp->size, mp->socket_id, flags);
  24         if (s == NULL)
  25                 return -rte_errno;
  26
  27         mp->pool_data = s;
  28
  29         return 0;
  30 }
  31
  32 static int
  33 stack_alloc(struct rte_mempool *mp)
  34 {
  35         return __stack_alloc(mp, 0);
  36 }
  37
  38 static int
  39 lf_stack_alloc(struct rte_mempool *mp)
  40 {
  41         return __stack_alloc(mp, RTE_STACK_F_LF);
  42 }
  43
  44 static int
  45 stack_enqueue(struct rte_mempool *mp, void * const *obj_table,
  46               unsigned int n)
  47 {
  48         struct rte_stack *s = mp->pool_data;
  49
  50         return rte_stack_push(s, obj_table, n) == 0 ? -ENOBUFS : 0;
  51 }
  52
  53 static int
  54 stack_dequeue(struct rte_mempool *mp, void **obj_table,
  55               unsigned int n)
  56 {
  57         struct rte_stack *s = mp->pool_data;
  58
  59         return rte_stack_pop(s, obj_table, n) == 0 ? -ENOBUFS : 0;
  60 }
  61
  62 static unsigned
  63 stack_get_count(const struct rte_mempool *mp)
  64 {
  65         struct rte_stack *s = mp->pool_data;
  66
  67         return rte_stack_count(s);
  68 }
  69
  70 static void
  71 stack_free(struct rte_mempool *mp)
  72 {
  73         struct rte_stack *s = mp->pool_data;
  74
  75         rte_stack_free(s);
  76 }
  77
  78 static struct rte_mempool_ops ops_stack = {
  79         .name = "stack",
  80         .alloc = stack_alloc,
  81         .free = stack_free,
  82         .enqueue = stack_enqueue,
  83         .dequeue = stack_dequeue,
  84         .get_count = stack_get_count
  85 };
  86
  87 static struct rte_mempool_ops ops_lf_stack = {
  88         .name = "lf_stack",
  89         .alloc = lf_stack_alloc,
  90         .free = stack_free,
  91         .enqueue = stack_enqueue,
  92         .dequeue = stack_dequeue,
  93         .get_count = stack_get_count
  94 };
  95
  96 MEMPOOL_REGISTER_OPS(ops_stack);
  97 MEMPOOL_REGISTER_OPS(ops_lf_stack);